I have a partial 1qt bottle of 100% pure Tung oil left over from a project I finished about 5 years ago. I squeezed all the air out of the bottle and capped it tightly before I stored it in my garage. It gets quite hot here in the summer and it’s been out there the whole time. Now there is about 3/4″ of whitish sediment in the bottom of the bottle. The color of the oil itself looks fine. I’m wondering what the sediment is and whether I should risk using the rest of the bottle.
Discussion Forum
Get It All!
UNLIMITED Membership is like taking a master class in woodworking for less than $10 a month.
Start Your Free TrialCategories
Discussion Forum
Digital Plans Library
Member exclusive! – Plans for everyone – from beginners to experts – right at your fingertips.
Highlights
-
Shape Your Skills
when you sign up for our emails
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. -
Shop Talk Live Podcast
-
Our favorite articles and videos
-
E-Learning Courses from Fine Woodworking
-
-
Replies
Well I will talk with you until you get some real help
I just went to my shelves that hold all my finishes and pulled out a jar of 100% Tung Oil I bought from Wood Craft at least three years ago. When I last used the finish I put it in a tall narrow jelly jar and dropped large marbles in until the oil came nearly to the lid , to get as much air out as possible, and put the lid on tight.
The Tung Oil looks perfect. There is absolutely no sediment or cloudiness in the bottom or otherwise. The room is relatively cool all year and is in the air conditioned part of the house so never gets above 80° F (my shop is in the garage and is not air conditioned).
I would recommend that you apply some of your Tung oil to some wood, first unstired and then stirred, on a second board, and see what transpires. Personally I would take it even further and put some on glass and see what happens to that as well. I did this when my Tung Oil was fresh and it grew a dry skin then over many days or weeks, I don't recall now, it developed what I would describe as micro wrinkles. Meaning it looked like a frosted beer glass. Like the glass had thickish frost on it.
I offer for comparison . . . at the same test period on another sheet of glass I put high quality linseed oil for use in mixing with the best quality artist's oils for painting on canvas and linen etc. (not "boiled" linseed oil). The oil dried, eventually, even in a thick little puddle, without developing any wrinkles let alone "frost" and was transparent.
Soooo, I am rambling a bit here but, you could put some samples of your oil on glass and compare your results to the puddles of oil that I tested when fresh and see how your oil behaves.
Bump
( : )
This forum post is now archived. Commenting has been disabled